Cisco IP Phone CP-8841-K9, widescreen VGA, High-quality Voice Communication, easy to use, Cisco EnergyWise

Cisco IP Phone CP-8841-K9, widescreen VGA, High-quality Voice Communication, easy to use, Cisco EnergyWise

Audio codec support
– G.711a-law and mu-law, G.722, G.729a, Internet Low Bitrate Codec (iLBC), and Internet Speech Audio Codec (iSAC)

Call features
– + Dialing
– Abbreviated dialing
– Adjustable ring tones and volume levels
– Adjustable display brightness
– Agent greeting
– Auto-answer
– Auto-detection of headset
– cBarge
– Busy Lamp Field (BLF)
– Busy Lamp Field (BLF) Pickup
– Busy Lamp Field (BLF) speed dial
– Callback
– Call forward
– Call forward notification
– Call filter
– Call history lists
– Call park
– Call pickup
– Call timer
– Call waiting
– Call chaperone
– Caller ID
– Corporate directory
– Conference, including traditional Join feature
– Cross Cluster Extension Mobility (EMCC)
– Direct transfer
– Extension mobility
– Fast-dial service
– Forced access codes and client matter codes
– Group call pickup
– Hold
– Intercom
– Immediate divert
– Malicious-caller ID
– Message-waiting indicator (MWI)
– Meet-me conference
– Mobility
– Music on hold (MoH)
– Mute
– Network profiles (automatic)
– On- and off-network distinctive ringing
– Personal directory
– PickUp
– Predialing before sending
– Privacy
– Private Line Automated Ringdown (PLAR)
– Redial
– Ring tone per line appearance
– Service Uniform Resource Locator (URL)
– Shared line
– Silent monitoring and recording
– Speed dial
– Time and date display
– Transfer
– Uniform Resource Identifier (URI) dialing
– Visual voice mail
– Voice mail
– Whisper coaching

Quality-of-service (QoS) options
– The phone supports Cisco Discovery Protocol and 802.1Q/p standards, and can be configured with an 801.1Q VLAN header containing the VLAN ID overrides configured by the Admin VLAN ID.

Network features
– Session Initiation Protocol (SIP) for signaling
– Session Description Protocol (SDP)
– IPv4 and IPv6
– User Datagram Protocol (UDP) (used only for Real-Time Transport Protocol [RTP] streams)
– Dynamic Host Configuration Protocol (DHCP) client or static configuration
– Gratuitous Address Resolution Protocol (GARP)
– Domain Name System (DNS)
– Trivial File Transfer Protocol (TFTP)
– Secure Hypertext Transfer Protocol (HTTPS)
– VLAN
– Real-Time Transport Protocol (RTP)
– Real-Time Control Protocol (RTCP)
– Cisco Peer-to-Peer Distribution Protocol (PPDP)
– Cisco Discovery Protocol
– LLDP (including LLDP-MED)
– Switch speed auto-negotiation

Security features
– Secure boot
– Secure credential storage
– Device authentication
– Configuration file authentication and encryption
– Image authentication
– Random bit generation
– Hardware cryptographic acceleration
– Certificate Authority Proxy Function (CAPF)
– Manufacturer-Installed Certificates (MIC)
– Locally Significant Certificates (LSC)
– Ethernet 802.1x supplicant options: Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling (EAP-FAST) and Extensible Authentication Protocol-Transport Layer Security (EAP-TLS)
– Signaling authentication and encryption using TLS
– Media authentication and encryption using SRTP
– HTTPS for client and server
– Secure Shell (SSH) Protocol server
– SSL-based VPN client

Physical dimensions (H × W × D)
– 9.02 x 10.13 x 1.57 in. (229.1 x 257.34 x 40 mm)

Weight (with handset)
– 2.58 lb (1.17 kg)

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